ErlWood update

Hi everyone,
I cannot open correctly in 3.6.1 a workflow generated in 3.5 as it says that ErlWood nodes are not available.
When I try to search for “old” version of ErlWood nodes, I got this from installing preocedures

"Cannot complete the install because of a conflicting dependency.
Software being installed: Erlwood Knime Open Source Cheminformatics 3.3.0.v201705051348 (org.erlwood.features.cheminformatics.base.feature.group 3.3.0.v201705051348)
Software currently installed: Erlwood Knime Open Source Core 3.3.0.v201701271222 (org.erlwood.features.core.base.feature.group 3.3.0.v201701271222)
Only one of the following can be installed at once:
Erlwood Knime Open Source Core 3.3.0.v201701271222 (org.erlwood.knime.core 3.3.0.v201701271222)
Erlwood Knime Open Source Core 3.3.0.v201701271223 (org.erlwood.knime.core 3.3.0.v201701271223)
Cannot satisfy dependency:
From: Erlwood Knime Open Source Cheminformatics 3.3.0.v201705051348 (org.erlwood.features.cheminformatics.base.feature.group 3.3.0.v201705051348)
To: org.erlwood.features.core.base.feature.group [3.1.0.v201705051348]
Cannot satisfy dependency:
From: Erlwood Knime Open Source Core 3.1.0.v201705051348 (org.erlwood.features.core.base.feature.group 3.1.0.v201705051348)
To: org.erlwood.knime.core [3.3.0.v201701271223]
Cannot satisfy dependency:
From: Erlwood Knime Open Source Core 3.3.0.v201701271222 (org.erlwood.features.core.base.feature.group 3.3.0.v201701271222)
To: org.erlwood.knime.core [3.3.0.v201701271222]

In knime.ini I have -clean option.
Best
Andrea